[regression] delayed window update in bionic

I recently reinstalled my laptop, going from i386 trusty to amd64 bionic. I kept using wine32 with an existing ~/.wine installation. I make of use of http://arm.64hosts.com/ which starts in a non-maximized window. The screen is not redrawn after maximizing until clicking in the window or otherwise moving the mouse inside the window. This is a regression over my previous experience.